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The magnification of an image formed by a lens is- 1. If the distance of the image from the optical centre of the lens is 35 cm, where is the object placed? What is the nature and focal length of the lens? If the object is displaced 20 cm towards the optical centre of the lens, where would the image be formed and what will be its nature? Draw a ray diagram to justify your answer.
Draw the ray diagram to show the formation of image by a concave mirror of focal length 15 cm for the following positions of object. (Diagrams may not be drawn to the scale.)
Indicate is placed at 30 cm from mirror.
a. object is placed at 30 cm from mirror.
b. object is placed at 10 cm form the mirror.